Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Societe Nationale D'etude Et De Construction De Moteurs D'aviation-snecma

Michel Thual

Georges Habarou

Pierre Camy

Fran&ccedil;ois Abbe

A steerable nozzle for a reaction engine comprises a fixed portion ( ) for fixing to the engine, a moving portion ( ) hinged to the fixed portion, control means ( ) for controlling the moving portion, and one or more resilient assemblies ( ) disposed between the fixed portion and the moving portion. The nozzle is characterized in that each resilient assembly comprises at least one fixed resilient stud ( ) having a first end secured to the fixed portion and a second end, opposite from the first end, secured to a rigid piece ( ); and at least one moving resilient stud ( ) having a first end secured to the moving portion and a second end, opposite from the first end, secured to said rigid piece ( ). In addition, each moving resilient stud ( ) is offset relative to each fixed resilient stud ( ) in a circumferential direction of the nozzle.

System for activating a steerable thrust-vectoring nozzle for a jet propulsion system using several circumferentially distributed elastic assemblies

A steerable nozzle for a reaction engine comprises a fixed portion ( ) for connection to the engine, a plurality of steerable flaps ( ) mounted on one end ( ) of the fixed portion, and flap steering means ( ). The nozzle is characterized in that the flap steering means comprise a resilient ring ( ) having a first circumference secured to said end ( ) of the fixed portion and a second circumference connected to the flaps ( ), and control means ( ) for moving the second circumference of the resilient ring.

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Blanquefort, France

Michel Thual